Diagram of the Circulatory System

Description

Diagram of the circulatory system, showing that it forms a single closed circuit with two pumps in it, represented by the right and left halves of the heart, which are separated in the diagram. Labels: ra and rv, right auricle and ventricle; la and lv, left auricle and ventricle; ao, aorta; sc, systemic capillaries; vc, vena cava, pa, pulmonary artery; pc, pulmonary capillaries; pv, pulmonary veins.